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Diffstat (limited to 'openssl/crypto/evp/e_rc4_hmac_md5.c')
-rw-r--r--openssl/crypto/evp/e_rc4_hmac_md5.c293
1 files changed, 293 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_rc4_hmac_md5.c b/openssl/crypto/evp/e_rc4_hmac_md5.c
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index 000000000..eaa7a5312
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+++ b/openssl/crypto/evp/e_rc4_hmac_md5.c
@@ -0,0 +1,293 @@
+/* ====================================================================
+ * Copyright (c) 2011 The OpenSSL Project. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#include <openssl/opensslconf.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_MD5)
+
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include <openssl/rc4.h>
+#include <openssl/md5.h>
+
+#ifndef EVP_CIPH_FLAG_AEAD_CIPHER
+#define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000
+#define EVP_CTRL_AEAD_TLS1_AAD 0x16
+#define EVP_CTRL_AEAD_SET_MAC_KEY 0x17
+#endif
+
+/* FIXME: surely this is available elsewhere? */
+#define EVP_RC4_KEY_SIZE 16
+
+typedef struct
+ {
+ RC4_KEY ks;
+ MD5_CTX head,tail,md;
+ size_t payload_length;
+ } EVP_RC4_HMAC_MD5;
+
+void rc4_md5_enc (RC4_KEY *key, const void *in0, void *out,
+ MD5_CTX *ctx,const void *inp,size_t blocks);
+
+#define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data)
+
+static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx,
+ const unsigned char *inkey,
+ const unsigned char *iv, int enc)
+ {
+ EVP_RC4_HMAC_MD5 *key = data(ctx);
+
+ RC4_set_key(&key->ks,EVP_CIPHER_CTX_key_length(ctx),
+ inkey);
+
+ MD5_Init(&key->head); /* handy when benchmarking */
+ key->tail = key->head;
+ key->md = key->head;
+
+ key->payload_length = 0;
+
+ return 1;
+ }
+
+#if !defined(OPENSSL_NO_ASM) && ( \
+ defined(__x86_64) || defined(__x86_64__) || \
+ defined(_M_AMD64) || defined(_M_X64) || \
+ defined(__INTEL__) ) && \
+ !(defined(__APPLE__) && defined(__MACH__))
+#define STITCHED_CALL
+#endif
+
+#if !defined(STITCHED_CALL)
+#define rc4_off 0
+#define md5_off 0
+#endif
+
+static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t len)
+ {
+ EVP_RC4_HMAC_MD5 *key = data(ctx);
+#if defined(STITCHED_CALL)
+ size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */
+ md5_off = MD5_CBLOCK-key->md.num,
+ blocks;
+ unsigned int l;
+#endif
+ size_t plen = key->payload_length;
+
+ if (plen && len!=(plen+MD5_DIGEST_LENGTH)) return 0;
+
+ if (ctx->encrypt) {
+ if (plen==0) plen = len;
+#if defined(STITCHED_CALL)
+ /* cipher has to "fall behind" */
+ if (rc4_off>md5_off) md5_off+=MD5_CBLOCK;
+
+ if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK)) {
+ MD5_Update(&key->md,in,md5_off);
+ RC4(&key->ks,rc4_off,in,out);
+
+ rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
+ &key->md,in+md5_off,blocks);
+ blocks *= MD5_CBLOCK;
+ rc4_off += blocks;
+ md5_off += blocks;
+ key->md.Nh += blocks>>29;
+ key->md.Nl += blocks<<=3;
+ if (key->md.Nl<(unsigned int)blocks) key->md.Nh++;
+ } else {
+ rc4_off = 0;
+ md5_off = 0;
+ }
+#endif
+ MD5_Update(&key->md,in+md5_off,plen-md5_off);
+
+ if (plen!=len) { /* "TLS" mode of operation */
+ if (in!=out)
+ memcpy(out+rc4_off,in+rc4_off,plen-rc4_off);
+
+ /* calculate HMAC and append it to payload */
+ MD5_Final(out+plen,&key->md);
+ key->md = key->tail;
+ MD5_Update(&key->md,out+plen,MD5_DIGEST_LENGTH);
+ MD5_Final(out+plen,&key->md);
+ /* encrypt HMAC at once */
+ RC4(&key->ks,len-rc4_off,out+rc4_off,out+rc4_off);
+ } else {
+ RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
+ }
+ } else {
+ unsigned char mac[MD5_DIGEST_LENGTH];
+#if defined(STITCHED_CALL)
+ /* digest has to "fall behind" */
+ if (md5_off>rc4_off) rc4_off += 2*MD5_CBLOCK;
+ else rc4_off += MD5_CBLOCK;
+
+ if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK)) {
+ RC4(&key->ks,rc4_off,in,out);
+ MD5_Update(&key->md,out,md5_off);
+
+ rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off,
+ &key->md,out+md5_off,blocks);
+ blocks *= MD5_CBLOCK;
+ rc4_off += blocks;
+ md5_off += blocks;
+ l = (key->md.Nl+(blocks<<3))&0xffffffffU;
+ if (l<key->md.Nl) key->md.Nh++;
+ key->md.Nl = l;
+ key->md.Nh += blocks>>29;
+ } else {
+ md5_off=0;
+ rc4_off=0;
+ }
+#endif
+ /* decrypt HMAC at once */
+ RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off);
+ if (plen) { /* "TLS" mode of operation */
+ MD5_Update(&key->md,out+md5_off,plen-md5_off);
+
+ /* calculate HMAC and verify it */
+ MD5_Final(mac,&key->md);
+ key->md = key->tail;
+ MD5_Update(&key->md,mac,MD5_DIGEST_LENGTH);
+ MD5_Final(mac,&key->md);
+
+ if (memcmp(out+plen,mac,MD5_DIGEST_LENGTH))
+ return 0;
+ } else {
+ MD5_Update(&key->md,out+md5_off,len-md5_off);
+ }
+ }
+
+ key->payload_length = 0;
+
+ return 1;
+ }
+
+static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr)
+ {
+ EVP_RC4_HMAC_MD5 *key = data(ctx);
+
+ switch (type)
+ {
+ case EVP_CTRL_AEAD_SET_MAC_KEY:
+ {
+ unsigned int i;
+ unsigned char hmac_key[64];
+
+ memset (hmac_key,0,sizeof(hmac_key));
+
+ if (arg > (int)sizeof(hmac_key)) {
+ MD5_Init(&key->head);
+ MD5_Update(&key->head,ptr,arg);
+ MD5_Final(hmac_key,&key->head);
+ } else {
+ memcpy(hmac_key,ptr,arg);
+ }
+
+ for (i=0;i<sizeof(hmac_key);i++)
+ hmac_key[i] ^= 0x36; /* ipad */
+ MD5_Init(&key->head);
+ MD5_Update(&key->head,hmac_key,sizeof(hmac_key));
+
+ for (i=0;i<sizeof(hmac_key);i++)
+ hmac_key[i] ^= 0x36^0x5c; /* opad */
+ MD5_Init(&key->tail);
+ MD5_Update(&key->tail,hmac_key,sizeof(hmac_key));
+
+ return 1;
+ }
+ case EVP_CTRL_AEAD_TLS1_AAD:
+ {
+ unsigned char *p=ptr;
+ unsigned int len=p[arg-2]<<8|p[arg-1];
+
+ if (!ctx->encrypt)
+ {
+ len -= MD5_DIGEST_LENGTH;
+ p[arg-2] = len>>8;
+ p[arg-1] = len;
+ }
+ key->payload_length=len;
+ key->md = key->head;
+ MD5_Update(&key->md,p,arg);
+
+ return MD5_DIGEST_LENGTH;
+ }
+ default:
+ return -1;
+ }
+ }
+
+static EVP_CIPHER r4_hmac_md5_cipher=
+ {
+#ifdef NID_rc4_hmac_md5
+ NID_rc4_hmac_md5,
+#else
+ NID_undef,
+#endif
+ 1,EVP_RC4_KEY_SIZE,0,
+ EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER,
+ rc4_hmac_md5_init_key,
+ rc4_hmac_md5_cipher,
+ NULL,
+ sizeof(EVP_RC4_HMAC_MD5),
+ NULL,
+ NULL,
+ rc4_hmac_md5_ctrl,
+ NULL
+ };
+
+const EVP_CIPHER *EVP_rc4_hmac_md5(void)
+ {
+ return(&r4_hmac_md5_cipher);
+ }
+#endif